Elevator



(No Model.) 4 Sheets-Sheet 1.

G. W. CLAYTON.

ELEVATOR.

No. 287,802. Patented Nov. 6,1883. I

(No Model.) 4 Sheets- -Sheet 2 G. CLAYTON ELEVATOR. I

No 287,802. Patented Nov. 6, 1883.

lo /////l/llllll/llllllllle IiI/ IIIIIIIIIIIIII/I mm 'ZT%///////A t/////////////T Z Lmze hi0 1:,

[120. ZU] O Z gffazz,

(No Model.) 4 Sheets-Sheet 4.

G. W. CLAYTON.

- ELEVATOR- No: 287,802. Patented Nov. 6, 1883.

m V 4 a n'ezw y GEORGE ELEVATOR.

NITEI) STATES PATENT 7 w. CLAYTON, OF CLEVELAND, onro, AssIGNoE OFONE-HALF TO THE BARRETT, MACHINE COMPANY, on SAME PLACE. I e

SPECIFICATION forming part of Letters Patent No.. 287,802, datedNovember 6', 1883.

Application filed September 2!), 1882. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE W. CLAYTON,"

of Cleveland, in the county of Ouyahoga and State of Ohio, have inventedcertain new and useful Improvements in Elevators, of which the.following is a specification.

My improvements consist of, first, an oil tight worm gear case; second,wormgear teeth; third, an independent adjustable brake; IO fourth,a-rocking frame for the guide-rolls;

. fifth, a safety device for elevator-platform.

In the accompanying drawings, Figurel is a side elevation of theworm-gear'case and the pulleys which operate said gear. Fig. 2 is avertical section of the same. Fig.3 is a face view of gear-teeth. Fig.4isatransversesection of the said case, worm-gear, and drum, showingattachment of brake. Fig. 5 isatop of brake andbelt-shifting attachment.{Figs 6 and 6-}- are sectional views of the topportion of car-frame,showing the safety attachment. Fig. 7 is a transverse section of same,showing the swinging g'uide-roll-frame attachment.

A is'the case, which contains and supports the worm-gear andtheworm-shaft. This case is made with oil-tight joints, the'object beingto have the case holdthe lubricant for the gear,

the gear-wheel bearings; and the worm-shaft bearings. The lower portionof the gear-wheel running in the oil conveys oil to the worm and itsshaft-bearings.

B is the gear-wheel, fixed on the drum-sh ft O, and Dis the drum. Saidgear-shaft O is. set in boxes 0 a, so constructed and secured to 5.thesides of the case as to prevent leakage or.

escape of oil. Box 0 covers the end of the shaft, and is firmly securedto the case by bolts, with suitable packing to make its connectionoil-tight.

40 is provided with a recess for packing a. The other end of thedrum-shaft issupported in the usual hanger. The teeth of gear wheel Bare made straight across" their top from side to. side; but theircontact sides are made curved 4 5 or angu1ar,having their centralportion thicker than the ends, as seen in Fig. 3. This is for thepurpose of reducing friction by making Shorter bearing-surface of thetooth on the worm. 5o Eis the worm, fixed on counter-shaft F, hav- Thebox 0 is similarly secured, and

on shelves 9 9, made in the case A. e e are screw-bolts attached to saidboxes f f, andsus pended in cross-bars h h in the case A, for thepurpose of adjusting the bearings of theworm-. shaft, thereby adjustingthe worm to the gear. z L are-collars on the shaft F, bearing againstthe inner ends .of the boxes f f, preventing endwise movements of theshaft. The worm E is covered with acap, attached to the case A, for thepurpose of preventing oil being' thrown outby the centrifugal force ofthe revolving worm. V

The shaft F'is provided with a set of tight and loose pulleys, G G,ofpeculiar construction, which I shall make the subject of a subsequentapplication. The outer end of said shaft F is sup orted in theu'sualhanger. An independent rake of peculiar construction is connectedto these pulleys. A short hanger, H, is suspended near the case A,having a hori 'zontal arm, H, connecting it therewith, and a secondshort hanger, H having a like horizontal arm, H connectedwiththeshaft-hanger ofshaft F. I is a lever having a short depending arm, I,and is pivoted at the angle tothe said arm H The depending end of said,lever I is connected by a link, 1 to a bar, J, supported in slots j'jmade in the lower part of said arms H and H whose end opposite to thelink is pivoted in the slot j. To the central part-of said bar J isattached a brakeshoe, K, bearing against the tight pulley G.

The long arm of lever I lies over the beltshifting bars L Land isprovided with an adjustable weight, L, which may be regulated'to makemore or less friction on the brake. The

belt-shifting bars L L play in slots in thelower ends of short hangers HH and are provided with loops Z Z for shifting belts. The said bars 9 LL are provided on their upper sldes with incline projections m m,designed for raising or car-frame. The frame is provided with adepending arm, n, the lower end of which bears on a spring, of. Thepurpose of this frame is to prevent noise and make the guide-wheelsself-adjusting to the guide-posts.

Between the two top rails of the car are placed two rock-shafts, eachprovided with an angle-lever, P P. The short arms 1) 1) have slots intheir ends, and are connected to the bifurcated draw-bar O by a pin, q,pass ing through said slots. The long arms of said levers P P reachdownward and are connected to the safety-bolts R R. The outer ends ofsaid bolts rest in slots in the corner-irons of the car-frame. Abovesaid levers P P, and to the draw-bar, is attached a spring, S, the endsof which are held in the corner-irons of the car-frame. The force ofsaid spring is intended to be exerted on the said levers P P, to quicklythrow out the safety-bolts in case the rope should break and the car besevered therefrom. The inner ends of bolts RR have slots W at theirconnection with the levers P, so that any inward movement by said leverswill not withdraw the bolts from the slots in the sides of thecar-frame. A light spring, t, is also attached to each of the levers P,whose lower ends bear against a pin, a, in said bolts, for the purposeof holding the bolts from sliding into the racks on the posts, which theaforesaid slots would permit them to do without the springs.

Having described my invention, I claim- 1. A worm-gear having teeth madefull in their central part and thinner at the sides, as and for thepurpose specified.

2. The independent brake consisting of the weighted lever I, havingshort arm I, pivoted to arm H of hanger H, and connected by link.

I to brake-bar J, carrying brake-shoe K, substantially as described.

3. The belt-shifting bars L L, having the incline projections m m, incombination with the weighted lever I,for removing break-pressure ondriving-pulley G, substantially as de scribed.

4. The rocking frame N, carrying guiderollers M, and having thedepending arm n, and the spring 71?, in combination with the carframe,substantially as andfor the purpose specified. p

5. The levers P P, having short slotted arms 1) p, hung on shortrock-shafts journaled be tween the top cross-bars of the car-frame, andconnected with drawbar O by pin q, and the spring S, the lower ends oflevers P connected to the safety-bolts R R, constructed to operatesubstantially as and for the purpose specified.

GEORGE W. CLAYTON.

Witnesses:

E. W. LAIRD, GEO. \V. TIBBITTS.

